MIL-HDBK-1004/10
FIGURES
Page
Figure
1
The Electrochemical Cell . . . . . . . . . . .
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6
2
Corrosion Cell - Zinc and Platinum
in Hydrochloric Acid . . . . . . . . . . . .
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6
3
Cathodic Protection Cell . . . . . . . . . . .
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7
4
Hydraulic Analogy of Cathodic Protection . . .
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7
5
Sacrificial Anode Cathodic Protection/Impressed
Current Cathodic Protection . . . . . . . . .
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9
6
Structure-to Electrolyte Potential Measurement
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14
7
Failure Rate Versus Time . . . . . . . . . . .
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17
8
Temporary Cathodic Protection System for
Determining Current Requirements . . . . . .
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23
9
4-Pin Soil Resistivity Measurement . . . . . .
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30
10
Soil Box for Determination of Resistivity . . .
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30
11
pH Meter . . . . . . . . . . . . . . . . . . .
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32
12
Antimony Electrode Potential Versus pH . . . .
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32
13
Coating Conductance - Short Line Method . . . .
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34
14
Coating Conductance - Long Line Method . . . .
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34
15
Continuity Testing - Potential Method . . . . .
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36
16
Continuity Testing - Potential Drop Method . .
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36
17
Continuity Testing - Pipe Locator Method . . .
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37
18
Insulation Testing - Two-Wire Test Station . .
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37
19
Interference from Impressed Current
Cathodic Protection System . . . . . . . . .
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40
20
Interference Due to Potential Gradients . . . .
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41
21
Interference Testing . . . . . . . . . . . . .
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42
22
Plot of Potentials from Interference Test . . .
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42
23
Measurement of Current Flow in Structure . . .
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44
24
Correction of Interferencce - Direct Bonding .
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44
25
Correction of Interference - Resistive Bonding
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45
26
Effects of Bonding on Interference Test
Potentials . . . . . . . . . . . . . . . . . . . . . . .
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46
27
Bonding for Continuity . . . . . . . . . . . .
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48
28
Control of Interference - Sacrificial Anode . .
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48
29
Interference Due to Cathodic Protection of
Quaywall . . . . . . . . . . . . . . . . . . . . . . . .
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50
30
Correction of Interference - Bonding . . . . .
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51
31
Equavalent Cathodic Protection Circuit . . . .
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54
32
Single-Phase - Full-Wave Bridge Rectifier . . .
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62
33
Full-Wave Rectified Current . . . . . . . . . .
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64
34
Single-Phase - Center Tap Circuit . . . . . . .
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64
35
Three-Phase Bridge Circuit . . . . . . . . . .
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65
36
Three-Phase Wye Circuit . . . . . . . . . . . .
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66
37
Half-Wave Rectified Current . . . . . . . . . .
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66
38
Constant Current Rectifier . . . . . . . . . .
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67
39
Constant Potential Rectifier . . . . . . . . .
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67
40
Multicircuit Constant Current Rectifier . . . .
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68
41
Efficiency Versus Voltage - Selenium Stacks . .
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72
42
Efficiency Versus Voltage - Silicon Stacks . .
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73
43
Anode-to-Cable Connection - Graphite Anode . .
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75
44
Center Connected Graphite Anode . . . . . . . .
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76
45
Duct Anode . . . . . . . . . . . . . . . . . .
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83
46
Button Anode . . . . . . . . . . . . . . . . .
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83
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